John chivill



(No Model.)

J. OHIVILL.

ELEVATOR BUCKET.

No. 371,549. Patented Oct. 18, 1887.

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UNITED STATES ATENT OFFICE.

JOHN OHIVILL, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE WEBSTER &

COMSTOOK MANUFACTURING ELEVATOR-BUCKET.

SPECIFICATION forming part of Letters Patent No. 371,549, dated October 18, 1887.

Application filed May 9, 1887. Serial No. 237,533.

To all whom it may concern:

Be it known that I,JOHN CHIVILL, of Ohicago, in the county of Cook and State of Illi nois, have invented certain new and useful Improvements in Elevator-Buckets, of which the following is a description, reference being had to the accompanying drawings, forming a part of this specification, in which- Figure 1 is a perspective View of my improved bucket. Fig. 2 is a vertical sectional view of the same, showing the interior; and Fig. 3 shows the form of the blank from which the bucket is constructed.

Like letters of reference designate corresponding parts in the respective figures.

The object of my invention is to construct from a sheet-metal blank an elevator-bucket which,when finished, may have a smooth back, rounded bottom, and preferably rounded front and rear corners, said bucket being riveted only at the ends, while the blank from which it is formed may be so constructed as to prevent a waste of metal in cutting it from the original sheet, all of which I accomplish in the manner hereinafter more particularly described and claimed.

A, Fig. 3 of the drawings, represents the mat or sheetmetal blank from which my improved bucket is constructed. Said mat is formed as follows: From the points a a, upon a line drawn longitudinally through the middle of the original rectangular blank, as indicated' in dotted lines, I draw the lines a b, a b, and a c, a c. From at or near the points I) b, respectively, are drawn curves 1) d I) (Z, and from the points 0 0 the curves 0 c c e. Oblique lines are then drawn from at or near the points d 6, respectively, to the pointsf upon the respective ends of the original blank,from whence lines f g f g and f hf h, respectively, are drawn to points intersecting with the extension of the several lines a b and a 0, thus forming wings A A and A A The blank is cut by means of a suitable die and the part A bent upon a shaper to substantially conform to the curves b d and c e, the former of which (X0 model.)

is preferably smaller than the latter, which causes the front of the bucket to flare outwardly more than the back. The wings A A are then bent inwardly and caused to overlap each other upon the respective euds,when they are secured in place by means of rivets j. The cup is then compressed in a suitable die to impart the rounded contour to the various corners, both front and rear, as indi- V cated in Fig. 1. I prefer to make the swagingblock somewhat narrower at the bottom than the distance between the points a a upon the blank, so that the edges of the blank represented by the lines I) c, Fig. 3, maybe crimped or rounded up to form a curved flange, 7c, Fig. 2, in the finished cup, which, being formed within the cup, does not tend to catch upon the elevator-case and thus derange the mech anism or wear the case. It will thus be seen that in constructing the blank in the manner described the waste of the sheet metal from which it is cut is reduced to a minimum, while the resulting cup is strong and durable, has no corners to collect and retain the material elevated, is not liable, by reason of its rounded contour, to catch upon parts adjacent thereto, and, moreover, the back being smooth, will not wear the belt to which it is attached, which is a common objection to elevator-buckets as ordinarily constructed.

Having thus described my invention, I claim As an improved article of manufacture, the elevator-cup described, made from a single piece of metal having wings A A at the back and A A at the front, combined with inte rior upwardly curved or rounded flanges It It, inelosed by the wings A A at the respective ends, which are lapped upon and riveted to each other, substantially as shown and described.

JOHN OHIVILL.

llitnesses:

D. H. FLETCHER, J. B. HALPENNY. 

